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Filtering a data packet by means of a network filtering device

A technology for filtering data packets and filtering devices, which is applied in the direction of data exchange through path configuration, data exchange network, digital transmission system, etc., and can solve problems such as firewall hazards, errors, implementation or configuration firewall errors, and achieve simplified adjustments and cost savings. small effect

Inactive Publication Date: 2016-05-11
SIEMENS AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cause of a defective mode of operation can be an error in the implementation or configuration of the firewall, or it can be an error caused by the firewall being compromised by an external attack

Method used

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  • Filtering a data packet by means of a network filtering device
  • Filtering a data packet by means of a network filtering device
  • Filtering a data packet by means of a network filtering device

Examples

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Embodiment Construction

[0055] exist figure 1 A network filtering device 100 is depicted in , which includes a multiplying unit 200 and a comparing unit 300 as well as a first filtering device FW1 and a second filtering device FW2. The multiplying unit 200 receives the data packet 10 from the first network NW1 on the port. The first network NW1 is, for example, an office network or a company network. In the first network NW1 there are no real-time requirements and in particular access from the Internet is possible. From a security or attack security standpoint, there is a weak link here. For example, the multiplying unit 200 doubles the data packet 10 and produces a first data packet 11 and a second data packet 12 . The respective contents of the respective data packets 11 , 12 are identical here.

[0056] The first data packet 11 is forwarded to the first filter device FW1. The first filter device FW1 is a first firewall with configurable filter provisions K1 or filter rules. The firewall chec...

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Abstract

There is a need for coupling, for example within an automation area, particularly critical subareas with less critical subareas of the automation area. The invention relates to a method and a network filtering device for filtering a data packet between a first network and a second network. According to the invention, a data packet is checked several times in parallel by means of a multiplier and a plurality of filtering devices.

Description

technical field [0001] The invention relates to a method and a network filtering device for filtering data packets between a first network and a second network. Background technique [0002] So-called security gateways (Security Gateways) or firewalls (Firewalls) are installed at network boundaries in order to achieve a controlled coupling of different network areas. In this case, network traffic is filtered such that only permissible network traffic is allowed to pass through. It is known to integrate such security gateways on terminals as personal firewalls. In particular, therefore, the coupling of differently critical (unterschiedlichkritisch) network regions is monitored, where "differently critical" means, for example, that additional, for example more stringent, requirements are imposed on the data packets to be processed in the network. [0003] In industrial automation systems, such as in signal towers or in the context of track automation in train control, in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/28
CPCH04L12/4625H04L43/028H04L43/12H04L41/0618H04L43/0882H04L47/125H04L47/28
Inventor R.法尔克D.冯奥海姆U.布勒歇尔
Owner SIEMENS AG
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